The Faculty [1998]

"Take me to your teacher."

Director: Robert Rodriguez
Writers: David Wechter (story), Bruce Kimmel (story) 

Stars: Josh Hartnett, Salma Hayek, Usher Raymond, Elijah Wood, Robert Patrick, Jordana Brewster, Clea DuVall and Laura Harris

Storyline

A horror tale set in a High School where the students suspect the teaching staff of being aliens, who are intent on making the students their victims.